Hi,
1. looks like Lissocacinus laevis
2. from the family Portunus, maybe sanguinolentus
3. not really an idea......
4. could be Platylambrus validus or Daldorfia horrida
5. hermit crabs are not really my thing, could be Aniculus aniculus.....
6. would say Gondactylus smithii, the eyes are left, holding its tail in front for defense
7. closest for me Xenocarcinus conicus